HW 4.43

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Lauryn Shinno 2H
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HW 4.43

Postby Lauryn Shinno 2H » Sun Nov 25, 2018 10:13 am

The homework question says: Noting that the bond angle of an sp3 hybridized atom is 109.5 degrees and that of an sp2 hybridized atom is 120 degrees, do you expect the bond angle between two hybrid orbitals to increase or decrease as the s-character of the hybrids is increased? Can someone explain what the s-character of a hybrid is?

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Joined: Fri Sep 28, 2018 12:17 am

Re: HW 4.43

Postby Sean_Rodriguez_1J » Sun Nov 25, 2018 12:52 pm

For this question, I thought of the "s-character" as the fraction of the s-orbitals in a hybridized atom (ex. of the three orbitals in an sp2 hybrid, 1 is an s-orbital, making the hybrid have 1/3, or about 33.3% "s-character"). So as shown in the problem, the larger the s-character (going from 1/4 in sp3 to 1/3 in sp2), the larger the bond angle (109.5 to 120 degrees). So overall the bond angle between two hybrid orbitals should increase as the s-character is increased.

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